Hello, codeforces

I write a personal C++ template for Competitive Programming Algorithms. It contains many common algorithms, especially mathematical ones.

I know that the more you use it, the more reliable it is. Almost all template are tested in a Chinese OJ: LuoGu. However, no one can ensure that no bugs in their codes.

Thanks in advance if you find some bugs or give other testes.

As we know, programmers hate two things:

• writing documents
• others who don't writing documents

Here is Document and Source Code for detail.

As an example, you can solve $$$n! \mod p$$$ in SPOJ where $$$0 < n, p < 10^{11}$$$, use following simple code.

#include <bits/stdc++.h>
#define clog(x) std::clog << (#x) << " is " << (x) << '\n';
using LL = long long;
#include "../cpplib/math.hpp"

// https://www.spoj.com/problems/FACTMODP/en/
int main() {
	// freopen("in", "r", stdin);
	std::cin.tie(nullptr)->sync_with_stdio(false);
	int cas = 1;
	std::cin >> cas;
	while (cas--) {
		LL n, p;
		std::cin >> n >> p;
		std::cout << factorial(n, p) << '\n';
	}
	return 0;
}

my submission contains 925 lines after copy some codes from math.hpp

UDP: The document for math.hpp have been enhanced with the help of kpw29's advice. UDP2: non-const member variables terminate with _, and std::move, std::forward are used,